Basic Probability

Front

What is probability?

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Front

What is the formula for calculating probability?

Back

Probability = (Number of favorable outcomes) / (Total number of possible outcomes)

Front

What is a favorable outcome in probability?

Back

A favorable outcome is an outcome that satisfies the condition of the event we are interested in.

Front

What is the total number of outcomes when rolling a standard die?

Back

The total number of outcomes when rolling a standard die is 6.

Front

If a bag contains 5 red balls and 3 blue balls, what is the probability of picking a red ball?

Back

Probability of picking a red ball = 5 / (5 + 3) = 5/8.

Front

What is the probability of flipping a coin and getting heads?

Back

The probability of getting heads when flipping a coin is 1/2.

Front

What is the probability of drawing an Ace from a standard deck of cards?

Back

The probability of drawing an Ace from a standard deck of cards is 4/52 or 1/13.

Front

What is the probability of rolling an even number on a die?

Back

The probability of rolling an even number (2, 4, or 6) is 3/6 or 1/2.

Front

What is the probability of picking a quarter from a bag containing 5 quarters, 2 dimes, and 4 pennies?

Back

Probability = 5 / (5 + 2 + 4) = 5/11.

Front

What is the probability of spinning a green section on a spinner divided into 4 equal parts: red, blue, green, and yellow?

Back

Probability of spinning green = 1/4.